P0442 2014 Chevrolet Silverado Code - Evaporative Emission System Small Leak Detected
Quick Answer
The engine off natural vacuum test is the small leak detection diagnostic for the evaporative emission system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0442 2014 Chevrolet Silverado indicates Evaporative Emission System Small Leak Detected.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0442 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0442 2014 Chevrolet Silverado?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Leaking EVAP Canister
- Leaking EVAP System Hose
- Leaking Fuel Tank
- Faulty Fuel Tank Pressure Sensor
How to Fix the DTC P0442 2014 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there are seven critical connections that could likely lead to this DTC being set:
1. Purge tube to purge valve (at intake manifold)
2. Purge tube to chassis EVAP line (at the rear of the engine, near transmission)
3. Chassis EVAP line to canister (at canister)
4. Fuel tank load line to canister (at canister)
5. Vent valve line to vent valve (at vent valve)
6. Fuel tank load line jumper connection (near fuel tank)
7. Fuel tank cap is closed properly (at refuel compartment)
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0442 2014 Chevrolet Silverado code?
Need more information on how to fix the P0442 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P0442 2014 Chevrolet Silverado Code
1. What does OBDII code P0442 on a 2014 Chevrolet Silverado mean?
- OBDII code P0442 indicates that the vehicle's onboard diagnostics system has detected a small leak in the evaporative emission control system.
2. What are the common symptoms of a P0442 code in a 2014 Chevrolet Silverado?
- Common symptoms of a P0442 code may include the illumination of the check engine light, a slight decrease in fuel efficiency, and the smell of gasoline vapors near the vehicle.
3. What are the possible causes of a P0442 code on a 2014 Chevrolet Silverado?
- Possible causes of a P0442 code include a loose or damaged gas cap, a cracked or disconnected hose in the evaporative emission system, or a faulty purge valve.
4. How serious is a P0442 code on a 2014 Chevrolet Silverado?
- While a P0442 code is not usually an immediate threat to vehicle safety, it can lead to increased emissions and decreased fuel efficiency if left unresolved.
5. How can I diagnose a P0442 code on my 2014 Chevrolet Silverado?
- Diagnosing a P0442 code typically involves checking the gas cap for proper sealing, inspecting hoses for damage or disconnection, and testing the purge valve for functionality.
6. Can I continue driving my 2014 Chevrolet Silverado with a P0442 code?
- It is generally safe to continue driving your vehicle with a P0442 code, but it is recommended to address the issue promptly to prevent potential long-term effects on emissions and fuel economy.
7. What is the typical cost to repair a P0442 code on a 2014 Chevrolet Silverado?
- The cost to repair a P0442 code can vary depending on the exact cause of the issue, but it may range from $100 to $500, including parts and labor.
8. Can I reset the check engine light after fixing a P0442 code on my 2014 Chevrolet Silverado?
- Yes, once the underlying issue causing the P0442 code has been resolved, you can reset the check engine light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.
9. How can I prevent a P0442 code from recurring on my 2014 Chevrolet Silverado?
- To prevent a P0442 code from recurring, ensure that the gas cap is tightened properly after refueling, regularly inspect the evaporative emission system components for damage, and follow the manufacturer's maintenance schedule.
10. Is it necessary to visit a mechanic for a P0442 code on my 2014 Chevrolet Silverado?
- While some DIY enthusiasts may be able to address a P0442 code themselves, consulting a mechanic is recommended for a proper diagnosis and professional repairs, especially if you are unsure about the issue.
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